/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.jobmaster;

import org.apache.flink.util.AbstractID;

import java.util.UUID;

/**
 * The {@link JobMaster} fencing token.
 */
public class JobMasterId extends AbstractID {

	private static final long serialVersionUID = -933276753644003754L;

	public static final JobMasterId INITIAL_JOB_MASTER_ID = new JobMasterId(0L, 0L);

	public JobMasterId(byte[] bytes) {
		super(bytes);
	}

	public JobMasterId(long lowerPart, long upperPart) {
		super(lowerPart, upperPart);
	}

	public JobMasterId(AbstractID id) {
		super(id);
	}

	public JobMasterId() {
	}

	public JobMasterId(UUID uuid) {
		this(uuid.getLeastSignificantBits(), uuid.getMostSignificantBits());
	}

	public UUID toUUID() {
		return new UUID(getUpperPart(), getLowerPart());
	}

	public static JobMasterId generate() {
		return new JobMasterId();
	}
}
